Software Engineer L3
Backend engineer on Twilio SendGrid's Email Platform, building and operating massive-scale distributed systems in Go that process over 12 billion emails at peak. Day to day: modernizing Go microservices, managing AWS/Azure infrastructure with Terraform, improving observability, and mentoring engineers. Remote within the US.
- Compensation
- $138.7K–$173.4K / yr
- Location
- Remote - US
- Work setup
- Remote
- Seniority
- Not specified
- Employment
- Not specified
- Experience
- 4+ years
- Category
- Software engineering
- Posted
Skills
Must have
- 4+ years of professional software engineering experience building and operating resilient backend services at scale
- Practical experience leveraging AI-assisted development tools (such as Claude Code)
- Strong hands-on production experience in Go (Golang), Java, or Python
- Experience deploying production workloads in cloud environments, ideally deep exposure to AWS core services and Azure equivalents
- Proficiency with Terraform for infrastructure as code
- Strong understanding of distributed datastores, caching layers, and asynchronous event streaming (e.g., Kafka)
- Strong computer science fundamentals, data structures, and building self-healing cloud architectures
Nice to have
- Experience managing high-throughput applications in containerized infrastructure (Docker, Kubernetes)
- Familiarity with database migration pathways (e.g., to AWS Aurora)
- Experience implementing OpenTelemetry or distributed tracing across microservices
- Experience with network topology, proxy layers, or mail transfer agent (MTA) protocols
Full description
See yourself at Twilio
Join the team as Twilio’s next Software Engineer, Email Platform (L3)About the job
This position is a critical engineering role within Twilio SendGrid, requiring a hands-on engineer capable of developing, deploying, and managing highly available, massive-scale distributed systems.
Our systems regularly process more than 12 billion emails during peak events like Black Friday, and our throughput requirements continue to scale rapidly. As an L3 engineer, you will act as a key driver of execution within our core services. You will be heavily involved in modernizing our backend systems, optimizing our extensive Go-based microservices, and contributing to the design and reliability of our dual-cloud infrastructure span across Amazon Web Services (AWS) and Microsoft Azure.
ResponsibilitiesIn this role, you’ll:
- WEAR THE CUSTOMER’S SHOES: Architect and ship reliable, high-velocity features that handle critical traffic with low end-to-end latency. Partner closely with product management and technical leadership to break down complex system requirements into manageable, iterative milestones.
- BE AN OWNER (CODE QUALITY): Drive rigorous code reviews and push for maintainable patterns in our Go codebase, ensuring high testing standards (unit, integration, and component testing) are executed across the team.
- BE AN OWNER (INFRASTRUCTURE & OBSERVABILITY): Manage and enhance cloud configurations across AWS and Azure environments utilizing Infrastructure as Code (Terraform). Ensure deep observability coverage by standardizing metrics, alerts, and distributed tracing across core data pipelines.
- CHAMPION ENGINEERING HEALTH: Advocate for a clean architectural foundation. Proactively identify technical debt, system bottlenecks, and single points of failure (SPOF), balancing feature delivery with critical platform refactoring.
- MENTOR AND LEAD: Foster a collaborative environment by mentoring junior engineers, leading technical sprint planning, and sharing expertise across distributed engineering nodes.
Qualifications
Twilio values diverse experiences from all kinds of industries, and we encourage everyone who meets the required qualifications to apply. If your career is just starting or hasn't followed a traditional path, don't let that stop you from considering Twilio. We are always looking for people who will bring something new to the table!
Required:
- Experience: 4+ years of professional software engineering experience building and operating resilient backend services at scale.
- Modern Development Workflow: Practical experience leveraging AI-assisted development tools (such as Claude Code) to accelerate code generation, automate testing, and streamline debugging workflows.